Tire-patching tool.



W. O. SHAW.

TIRE PATGHING TOOL.

, APPLICATION rum JAN.22,1913,

Patented June 3, 1913.

Suva 11 Fox rm 57 61 M WILLIAM O. SHAW, OF ST. PAUL, MINNESOTA.

TIRE-PATCHING TOOL.

Specification of Letters Patent.

Application filed January 22, 1913.

Patented June 3, 1913.

Serial No. 743,690. I

To all whom it may concern:

Be it known that I, l/VILLIAM O. SHAW, a citizen of the United States,residing at St. Paul, in the county of. Ramsey, State of Minnesota, haveinvented certain new and useful Improvements in Tire Patching Tools; andI do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to tire patching tools.

The object of the invention resides in the provision of a tool of thecharacter named which will efficiently hold the patch to the inner tubeof a tire throughout the entire extent of the patch while the securingcement is setting.

With the above and other objects in view the invention consists in thedetails of construction and in the arrangement and combination of partsto be hereinafter more fully described and particularly pointed out inthe appended claim.

In describing the invention in detail reference will be had to theaccompanying drawings wherein like characters of reference denotecorresponding parts in the several views, and in which- Figure 1 is aside elevation of the tool with the parts in clamping position in fulllines and release position in dotted lines; Fig. 2, a vertical sectionof the tool showing same operatively applied to secure a patch to aninner tube; Fig. 3, a section on the line 3 3-of Fig. 1, and Fig. 1, afront view of what is shown in Fig. 1.

Referring to the drawings the tool is shown as comprising pivotallyconnected curved arms 10 and 11, the latter arm having a greatercurvature than the former. The free ends of these arms 10 and 11terminate respectively in enlarged portions forming cooperating clampingplates 12 and 13 respectively, the plate 1.3 having its active faceconcaved or dished as at 141 so as to receive the patch indicated at 15and properly allow for the varying thickness 01' the patch. The meansfor locking the plates 12 and 13 in clamping relation is shown ascomprising a yoke including a tubular stem 16 which terminates at oneend in spaced arms 17 and 18. These arms 17 and 18 embrace both the arm10and the arm 11 and are pivotally connected to the former as at 19. Theinner portion of the outer edge of the arm 11-is disposed in a curve ofa circle whose center is between the free end of the arm 10 and thepivot 19, while the outer portion of said outer edge of the arm 11 isdisposed in a curve of a circle whose center is between the inner end ofthe arm 10 and the pivot 19 with the result that a notch or depression20 is formed substantially at the center of the outer edge of the arm11.

In applying the tool the desired inner tube and patch is placed upon theplate 12 and the yoke is swung from the position shown in dotted linesin Fig. 1 to the position shown in full lines. During this movement ofthe yoke the plates 13 and 14 will be forced together to clamp the innertube and patch. Before the set screw 21 can be operated the inner tubeand patch will tend to throw the plates 12 and 13 apart but owing to thecurvature of the outer edge of the arm 11 the yoke will be preventedfrom moving from the position shown in full lines in Fig. l and theplates 12 and 13 will be held against any decided movement away fromeach other so that the correct position of the work between the plateswill be preserved wlfile the set screw 21 is being operated to force theplates 19 and 13 more firmly upon the work. After the set screw 21 hasbeen operated to draw the plates 12 and 13 together with the desiredforce the parts are allowed to remain in this state until the securingcement is firmly set to unite the patch to the inner tube.

lVhat I claim is:

A tool of the class described comprising a pair of arms pivotallvconnected at one end and terminating at their other ends in cooperatingclai'nping plates. a yoke pivotally connected to one of said arms andembracing the other arm, the outer edge of the embracing arm having itsforward and rear portions disposed in the curves of circles whosecenters are between the pivot of the yoke and the inner and outer endsof said arm respectively whereby a depression is In testimony whereof, Iaflix my signaformed at the center of the outer edge of the ture, in thepresence of two witnesses. embraced arm, and a set screw carried byWILLIAM O. SHAW. I the yoke and cooperating with the last Witnesses: 5named arm to force and lock said clamping FRANCIS BOYLE,

plates in clamping position. G116. H. CHANDLEE.

( -pies of this patent may be obtained for five cents eacli, byafidressing the Commissioner of Patents, Washington, D. C.

